IMO "going shorter" has major issues for standard of living when you are used to longer. You can feel really cooped up in the shorter rig. Clever floor plans can help with that, but can't change it.
We had a thread here a while back on the pros and cons of 24s vs 28s that would be worth reviewing before pulling the trigger on a 24.
EG, I like to be up early, make coffee, and use the bathroom while DW likes to sleep in. A door is way better than a curtain! What if one person likes to read a book while the other likes to watch TV? Doors are better than curtains! Ours has twin beds in the back which is good for having to get up in the night without disturbing the other as was mentioned above. :(
I don't agree that slides are bad. The more living space you can have the better, no matter whether a 24 or a 28. Slides are common in RVs for years now and they are not a mechanical/electrical nightmare. If they act up, it is usually an easy fix like a new in/out switch.
Ours has swivel chairs opposite the table instead of a long sofa-bed. You can swivel and look out the windows on that side, but on a sofa, you can't do that. Also there is lots of floor space behind the two chairs for where all the many shoes and sandals go. Can't do that with the sofa option. So where would all those shoes and sandals go? You can swivel to watch TV, but on a sofa you have to find a way to sprawl out with a cushion behind you--not comfy IMO.
I get being gun-shy from that experience with the long A, but length had nothing to do with it. You get the same fix result for that by going to a longer C as by going to a shorter C. 28 is still shorter than 32. Of course DW is the one that will decide that.
Do spend time in a 24 and in a 28 and really think about how it would feel after a while depending on your lifestyles. Perhaps a 24 would work. Not for us. YMMV